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From: | 손성환 |
Subject: | [Discuss-gnuradio] OFDM problem with USRP and GRC |
Date: | Mon, 18 Jan 2010 22:41:11 +0900 |
Hi all I am trying OFDM transmission and receive
test. I’m using Ubuntu 9.10, gnuradio version 3.3
and two USRP boards with basic TX and RX and I am using GRC. In the GRC I make simple test signal flow
with usrp Tx : File source -> OFDM mod -> USRP
sink Rx : USRP source-> OFDM demod ->file
sink As a my test I could not show not only constellation
but also any other signal(scope and file data) But I could show receive spectrum using fftsink
with USRP However I created simple example like
follow, it operate well. File source-> OFDM mod-> OFDM demod ->file
sink In order to test USRP part I tested gpsk
example in the gnuradio-examples It operate well. I could show constellation. How can I operate well OFDMmod / demod
examples? Additionally I wanna confirm constellation
of OFDM demod data. But GRC block of the OFDM demod are
encapsulate. So To confirm OFDM démod constellation, I guess that I sholul split
OFDM démod block. Am I correct? Can you have a some hint? Sohn |
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